Evidence for the onset of Frohlich Mode Conductivity in K sub (0.30) MoO sub 3.

We have investigated novel nonlinear conduction properties in K sub (0.30) sub MoO sub 3 at temperatures below 40K. At threshold fields of several V/cm the current is observed to increase sharply by 8 to 10 orders of magnitude. The transition into the highly conducting state is characterized by an exponential I,V-characteristic which becomes bistable at high currents. Narrow-band noise is observed with a linear frequency to current dependence over five orders of magnitude. Comparison with theoretical predictions supports the model of an onset of rigid CDW motion at low temperatures and high fields.